Breathing pattern and muscle activity using different inspiratory resistance devices in children with mouth breathing syndrome.

Autor:	Medeiros da Fonsêca JD; PneumoCardioVascular Lab/HUOL, Hospital Universitário Onofre Lopes, Empresa Brasileira de Serviços Hospitalares and Departamento de Fisioterapia Universidade Federal do Rio Grande do Norte, Natal, Brazil.; Laboratório de Inovação Tecnológica em Reabilitação, Departamento de Fisioterapia, Universidade Federal do Rio Grande do Norte, Natal, Brazil., Aliverti A; Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy., Benício K; PneumoCardioVascular Lab/HUOL, Hospital Universitário Onofre Lopes, Empresa Brasileira de Serviços Hospitalares and Departamento de Fisioterapia Universidade Federal do Rio Grande do Norte, Natal, Brazil.; Laboratório de Inovação Tecnológica em Reabilitação, Departamento de Fisioterapia, Universidade Federal do Rio Grande do Norte, Natal, Brazil., de Farias Sales VS; Departamento de Análises Clínicas e Toxicológicas, Universidade Federal do Rio Grande do Norte, Natal, Brazil., Fontes Silva da Cunha Lima L; Departamento de Cirurgia, Universidade Federal do Rio Grande do Norte, Natal, Brazil., Resqueti VR; PneumoCardioVascular Lab/HUOL, Hospital Universitário Onofre Lopes, Empresa Brasileira de Serviços Hospitalares and Departamento de Fisioterapia Universidade Federal do Rio Grande do Norte, Natal, Brazil.; Laboratório de Inovação Tecnológica em Reabilitação, Departamento de Fisioterapia, Universidade Federal do Rio Grande do Norte, Natal, Brazil., de Freitas Fregonezi GA; PneumoCardioVascular Lab/HUOL, Hospital Universitário Onofre Lopes, Empresa Brasileira de Serviços Hospitalares and Departamento de Fisioterapia Universidade Federal do Rio Grande do Norte, Natal, Brazil.; Laboratório de Inovação Tecnológica em Reabilitação, Departamento de Fisioterapia, Universidade Federal do Rio Grande do Norte, Natal, Brazil.
Jazyk:	angličtina
Zdroj:	ERJ open research [ERJ Open Res] 2022 May 09; Vol. 8 (2). Date of Electronic Publication: 2022 May 09 (Print Publication: 2022).
DOI:	10.1183/23120541.00480-2021
Abstrakt:	Aim: The aim of this study was to evaluate the acute effects of different inspiratory resistance devices and intensity of loads via nasal airway on the breathing pattern and activity of respiratory muscles in children with mouth breathing syndrome (MBS). Methods: Children with MBS were randomised into two groups based on inspiratory load intensity (20% and 40% of the maximal inspiratory pressure). These subjects were assessed during quiet breathing, breathing against inspiratory load via nasal airway and recovery. The measurements were repeated using two different devices (pressure threshold and flow resistance). Chest wall volumes and respiratory muscle activity were evaluated by optoelectronic plethysmography and surface electromyography, respectively. Results: During the application of inspiratory load, there was a significant reduction in respiratory rate (p<0.04) and an increase in inspiratory time (p<0.02), total time of respiratory cycle (p<0.02), minute ventilation (p<0.03), tidal volume (p<0.01) and scalene and sternocleidomastoid muscles activity (root mean square values, p<0.01) when compared to quiet spontaneous breathing and recovery, regardless of load level or device applied. The application of inspiratory load using the flow resistance device showed an increase in the tidal volume (p<0.02) and end-inspiratory volume (p<0.02). Conclusion: For both devices, the addition of inspiratory loads using a nasal interface had a positive effect on the breathing pattern. However, the flow resistance device was more effective in generating volume and, therefore, has advantages compared to pressure threshold. Competing Interests: Conflict of interest: J.D. Medeiros da Fonsêca has nothing to disclose. Conflict of interest: A. Aliverti is co-inventor of optoelectronic plethysmography, the patent rights to which are held by his institution, the Politecnico di Milano. Conflict of interest: K. Benício has nothing to disclose. Conflict of interest: V.S. de Farias Sales has nothing to disclose. Conflict of interest: L. Fontes Silva da Cunha Lima has nothing to disclose. Conflict of interest: V.R. Resqueti has nothing to disclose. Conflict of interest: G.A. de Freitas Fregonezi has nothing to disclose. (Copyright ©The authors 2022.)
Databáze:	MEDLINE
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